Wow, Anesthtc! You beat us all to it! Accepted without interview? Are you a WICHE student?? What state are you from? Awesome for you! Congrats!!
I actually had the same question as you and just assumed that the 'portal' that everyone was referring to for WSU is the completed supplemental form that stated where your application was in the process. In my case, even though I was granted an interview, the supplemental form still states 'pending' (unlike our ID Dydrmr01 friend above), so I wouldn't trust the 'portal' as an official source of info, I'd wait for the letters.
Congrats to you (on your acceptance), and to Dydrmr01, on your ID interview! Hope to see you both next year as part of the WIMU Class of 2018!!